化工进展2017，Vol.36Issue(11)：4093-4098,6.DOI:10.16085/j.issn.1000-6613.2017-0435
壁载氨氧化催化剂X/TiO2(X=Pt、Pd、Au)制备与反应机理
Preparation of wall-loaded X/TiO2 (X=Pt,Pd,Au) catalysts for ammonia oxidation process and the reaction mechanism
摘要
Abstract
Wall-loading is an effective method to load catalyst inside microchannel reactor,which can be applied to highly exothermic gas-solid reactions such as ammonia oxidation. However,the catalytic performance of different wall-loaded catalysts needs to be further studied. In this research,three metals Pt,Pd,and Au,were loaded on TiO2 nanotubes by photocatalytic deposition,and then assembled in a microchannel reactor to evaluate their catalytic performance for ammonia oxidation. The performance difference was discussed based on the density functional method. Results confirmed that no significant catalytic activity of bare TiO2 nanotubes had been observed. The determined activity sequence of three catalysts is Pt/TiO2>Pd/TiO2>Au/TiO2. Ammonia conversion by Pt/TiO2 reached 100％ at 280℃,and NO selectivity was up to 99％ at 380℃. TPD analysis and simulation confirmed the adsorption energy of NH3 and O2 on the catalyst surface was in the order of Pt>Pd>Au,which was consistent with that of their catalytic activity.关键词
催化剂/化学反应/数值模拟/微反应器/吸附Key words
catalyst/chemical reaction/numerical simulation/microreactor/adsorption分类
化学化工引用本文复制引用
邱伟,陶阳,蒋炜,梁斌..壁载氨氧化催化剂X/TiO2(X=Pt、Pd、Au)制备与反应机理[J].化工进展,2017,36(11):4093-4098,6.基金项目
国家自然科学基金项目(21476146,21176157). （21476146,21176157）
